Lucy

I'm sorry about the loss of your fish.
When you say your readings are fine, what are the numbers?
Have you added any new fish lately? What's the temperature of the water?

kieley

is the 'clamped fin' diagnosis for all fish or just guppys?

Lucy

Anytime a fish shows clamped fins, it's not feeling well.
Unless there are species who normally hold their fins close to their bodies. (None that I can think of now)

sirdarksol

I wouldn't move the fry to the baby tank until you determine the reason for the deaths. If it was an infection, you'd be transferring the infection to the fry tank.

Charmaine

I added new guppys a week ago and those are the ones that survived. All readings are 0 except for the PH - 7.8. The babys are all still alive.

saqib

thats not the sort of reading you'd expect from a fully cycled tank...it usually shows some nitrate content

Blub

I've seen cycled tank with 0 nitrate.

misty spills

i had a fish sickness the other day sounded just like yours except a couple got these red welts type thing on there fins soon after they were all dying too so i went to the pet store and got some good stuff called "TONIC" did them just fine and now no more deaths

i lost like 10 or 20odd in the process because i had never heard of such a sickness, but now i do...

hope you fix the problem soon